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Sieve — Startup Profile
Startup

Sieve

Your personalized AI email filter

Productivity & Collaboration

Astracia Signal Score

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About the startup

Sieve catches what spam filters on Gmail miss. Customize its filter to get rid of sales pitches, broker inbound, recruiter blasts, and anything else you don't want to see. Those from your network or cold outreach you actually care about is untouched. Coming soon: auto-unsubscribe from mailing lists + scrubbing your contact from various outbound databases. Built with privacy in mind. Sieve never stores your email content and is CASA Tier 2 certified/SOC2 in-progress.

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Explore expertise in Productivity & Collaboration

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Technomanagers

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David Allen

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Media about Productivity & Collaboration

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Shows and channels grouped by topic. A recommendation does not mean this profile was featured or endorsed.

Show

Thoughts from the Ivory Basement

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Ai & SaaS Lab

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Founder stories from Productivity & Collaboration startups

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Retold founder accounts from startups in the same category, each linked to the original.

Story

Buffer's first paying customer arrived four days after a seven-week build

Joel Gascoigne validated Buffer with a two-page landing flow, spent seven weeks of evenings and weekends on a minimal product, launched on 30 November 2010, and recorded a first paying customer within four days.

Tibo stated sub-$2M ARR at sale and $6–7M later, not catalog $3.5M

In a January 2024 Bootstrapped Founder interview, Thibault Louis-Lucas did not quote a $10M sale price or $3.5M ARR; he said Lempire acquired them below $2M annual recurring revenue and that they were nearing $6–7M, with

Tally's March 2024 letter is $100k MRR, not a $3M ARR stamp

Marie Martens wrote that Tally, launched in summer 2020 with Filip, hit $100k monthly recurring revenue in February 2024 with a bootstrapped team of three and more than 250,000 users; this record uses those founder label

Ajay Goel priced GMass after a free year, not after an ARR headline

Ajay Goel’s own GMass posts give send volume, user counts, and plan prices. In a later interview he described a $10,000 first build, a free first year, and $10,000 to $20,000 a month after the paywall. He did not state $

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